Description of what Digital Orthophoto Quadrangles are and how to obtain them plus information on the DOQ program, points of contact, DOQ status graphic, examples of DOQs, and free data viewer software.

The Vegetation Drought Response Index is a drought monitoring and mapping tool integrating satellite observations of vegetation and climate with land cover, soil characteristics, and other environmental factors.

Links to model documentation, search engine, and help for (FEQ) Full Equations (a computer model for one-dimensional unsteady flow in open channels and through control structures), and the Full Equations Utilities package (FEQUTL).